''Taubacrex'' is an

extinct Extinction is the termination of an organism by the death of its Endling, last member. A taxon may become Functional extinction, functionally extinct before the death of its last member if it loses the capacity to Reproduction, reproduce and ...

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

of birds of the family

Quercymegapodiidae Quercymegapodiidae is an extinct group of stem Galliformes birds with fossils found in France and Brazil Brazil, officially the Federative Republic of Brazil, is the largest country in South America. It is the world's List of countries and ...

from the

Late Oligocene The Chattian is, in the geologic timescale The geologic time scale or geological time scale (GTS) is a representation of time based on the rock record of Earth. It is a system of chronological dating that uses chronostratigraphy (the pro ...

Early Miocene The Early Miocene (also known as Lower Miocene) is a sub-epoch of the Miocene epoch (geology), Epoch made up of two faunal stage, stages: the Aquitanian age, Aquitanian and Burdigalian stages. The sub-epoch lasted from 23.03 ± 0.05 annum, Ma to ...

(

Deseadan The Deseadan () age is a period of geologic time (29.0–21.0 Ma) within the Oligocene epoch of the Paleogene to the Early Miocene epoch of the Neogene, used more specifically within the SALMA classification of South America. It follows the Tingu ...

)

Tremembé Formation Tremembé is a municipality in the state of São Paulo in Brazil. It is part of the Metropolitan Region of Vale do Paraíba e Litoral Norte. The population is 47,714 (2020 est.) in an area of 191.09 km². The elevation is 560 m. A s ...

of the

Taubaté Basin Taubaté is a medium-sized city in the state of São Paulo (state), São Paulo, in southeastern Brazil. History Taubaté was part of the ancient Tupinambá people, Tupinambá Territory, along the Paraíba do Sul, Paraíba do Sul River. The Tu ...

in the state of

São Paulo São Paulo (; ; Portuguese for 'Paul the Apostle, Saint Paul') is the capital of the São Paulo (state), state of São Paulo, as well as the List of cities in Brazil by population, most populous city in Brazil, the List of largest cities in the ...

, Brazil. The type species is ''Taubacrex granivora''. In the original description,

Herculano Alvarenga Herculano Marcos Ferraz de Alvarenga (born 7 November 1947) is a Brazilian ornithologist, paleontologist and physician, founder of the Taubaté Natural History Museum.Alvarenga, H. (2004) Tucanos das Américas/Toucans of the Americas. M. Pontu ...

classified it as a member of family

Rallidae Rails (avian family Rallidae) are a large, Cosmopolitan distribution, cosmopolitan family (biology), family of small- to medium-sized terrestrial and/or semi-amphibious birds. The family exhibits considerable diversity in its forms, and includes ...

. It provides the earliest fossil record of

gastrolith A gastrolith, also called a stomach stone or gizzard stone, is a rock held inside a gastrointestinal tract. Gastroliths in some species are retained in the muscular gizzard and used to grind food in animals lacking suitable grinding teeth. In ...

s in birds of the order

Galliformes Galliformes is an order (biology), order of heavy-bodied ground-feeding birds that includes turkey (bird), turkeys, chickens, Old World quail, quail, and other landfowl. Gallinaceous birds, as they are called, are important in their ecosystems ...

.Mayr, Gerald (2009) ''Paleogene Fossil Birds''. Berlin: Springer.

References

Quercymegapodiidae Paleogene birds of South America Oligocene animals of South America Miocene birds of South America Deseadan Paleogene Brazil Neogene Brazil Fossils of Brazil Fossil taxa described in 1988 Tupi–Guarani languages {{paleo-bird-stub